2023 June 16 - Sunrise to Sunset over the Baltic Sea

Introduction to the NASA APOD00:00:05

The video introduces the NASA Astronomy Picture of the Day (APOD) for June 16, 2023, featuring a unique panoramic image titled 'Sunrise to Sunset over the Baltic Sea'.

Explaining the Composite Imaging Technique00:00:35

The image is a composite made from thousands of frames taken between 7 PM and 6:30 AM. A single column from each frame was stitched together to compress the entire night into one continuous photograph.

Visual Phenomena: Stars and Auroras00:01:46

The transition from day to night and back to day is visible across the image. The darkest center section reveals stars and the Aurora Borealis, which are caused by solar particles striking Earth's atmosphere.

Geographic Context and Summary00:03:00

The photograph was taken at a high latitude in Sweden over the Baltic Sea, explaining the prevalence of the Northern Lights due to the interaction between solar particles and the atmosphere.